/
a single slash
AND NOT
/forum/
like it is now
Done this, may reset all session to all users into acp, so they'll be forced to relogin
as explained and linked into install procedure:NOTE: if cookie setting changed to be available over all domain because it was not, then all phpBB users may need to re-login using new board’s cookie settings: in this case, you may would like to force all phpBB users to re-login in case they saved their session cookie with a ‘remember me login’. This can be done by accessing phpBB ACP main page: check for option
Purge all sessions
Purge all sessions. This will log out all users by truncating the session table.
Click the Run now button.
Be sure that the cookie setting is correct before to execute these steps, or you’ll be logged out by your board until you’ll not reset to the correct cookie domain!
https://www.axew3.com/w3/2016/02/config ... ll-domain/